in the family

(all) in the family

Within or among only the members of a family or other small, intimate group. Hey, keep that in the family, will ya? I don't want everyone to know I'm pregnant just yet! Janet is planning to break up with Kevin next week, but keep it in the family, OK? Make sure this news stays in the family. I really don't want anyone else to hear about my resignation before I officially tell the boss.
See also: family
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

(all) in the family

restricted to one's own family, as with private or embarrassing information. Don't tell anyone else. Please keep it all in the family. He only told his brother because he wanted it to remain in the family.
See also: family
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also: